Space Slug Territory

If you control two or more other lands, Space Slug Territory enters the battlefield tapped.

{t}: Add {u}.

{5}{u}: Until end of turn, Space Slug Territory
becomes a 7/7 blue Space Slug creature with ward 3.
It's still a land. (Whenever it becomes the target of
a spell or ability an opponent controls, counter it
unless that player pays 3.)